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Base Builder
Beta 0.1
The RustPotato Base Builder snaps pieces like the game and keeps the bill: cost from twig, upkeep a day, a plan of every floor.
Loading the 3D view
Loading the 3D view
W A S D walk · Shift run · Ctrl or C crouch · Space jump · N fly · E opens a door · Esc back to the 3D view
Floor plans
A worked base: a stone 2x2 with a floor
The Rust Base Builder's worked example is a stone 2x2 with one upper floor: 4 foundations, 15 walls and a doorway, an L-shaped stair, 7 floors (the roof included), a Sheet Metal Door in the doorway, and the Tool Cupboard upstairs. Placing those 28 blocks in twig and upgrading them to stone with the door and cupboard costs 7,260 stones, 2,210 wood and 150 metal fragments. Upkeep is 895 stones and 18.5 metal fragments a day (12.3 %, 8 cupboard slots a week).
Its three floor plans, from the ground floor to the roof, seen from above:
| Piece | Count | Stone upgrade, or recipe |
|---|---|---|
| Foundation | 4 | 1,200 stones |
| Wall | 15 | 4,500 stones |
| Doorway | 1 | 210 stones |
Sheet Metal Door
|
1 | 150 metal fragments |
| L Shaped Stairs | 1 | 300 stones |
| Floor | 7 | 1,050 stones |
Tool Cupboard
|
1 | 1,000 wood |
How the Rust Base Builder snaps a piece
The Rust Base Builder, a 3D base planner and base designer for Rust, snaps pieces by their sockets the way the Building Plan does in game: a piece fits when one of its male sockets meets a free female socket of the same type, such as a wall on a foundation edge or a floor on a wall top.
The builder reads those sockets for all 20 blocks of the Building Plan and for 27 doors, frame fills, window bars and hatches, and places each piece with the game's own turn rule. The 28 deployables, from high external walls and gates to furnaces, workbenches and boxes, follow their own placement checks read from the game: what they stand on, how steep, and what they may not pass through. A socket that already holds a piece is refused, like in the game. Each block wears the game's model and textures and takes the shape its neighbours give it: two roofs side by side lose the trim between them, roofs meeting at a corner turn into a hip or a valley, a wall under the side of a roof becomes a gable, and a ramp on a foundation is the low one.
Triangle foundations and why a grid gets them wrong
In the Rust Base Builder, a triangle foundation has three edges with their own sockets, placing walls and floors at angles a square grid cannot hold so triangle honeycomb closes as in game. A triangle foundation costs half a square (25 wood and 150 stones vs 50 and 300), yet counts as one full block in upkeep.
What the Base Builder's bill counts
The Rust Base Builder works as a Rust base cost calculator: every block is placed and paid in twig first, then the Hammer upgrade charges the full price of the target grade, so a wall taken to stone costs 50 wood and 300 stones. Doors, frame fills, deployables and the cupboard cost their crafting recipe.
A full wall costs 50 wood in Twig (10 HP), 200 wood in Wood (250 HP), 300 stones in Stone (500 HP), 200 metal fragments in Sheet Metal (1,000 HP) or 25 high quality metal in Armored (2,000 HP). Daily Tool Cupboard upkeep is a bracketed share of the blocks' current grade cost: the first 15 blocks at 10 %, the next 50 (up to 65) at 15 %, the next 125 (up to 190) at 20 % and every block above 190 at 33.3 %. Doors, frame fills and deployables with upkeep pay that same average rate, while the cupboard pays none.
Saving, sharing and opening a Rust base
The Rust Base Builder keeps the base you are on in this browser, and Save this base stores more under a name, in a list you can export. Copy the link to share one: the whole base sits after the # and nothing is sent anywhere. Download the file for the Copy Paste plugin servers use; the builder opens those files too.
What the Rust Base Builder does not do yet
The Rust Base Builder builds on flat ground rather than sloped terrain or caves, though Shift + mouse wheel raises or lowers a foundation within its ground height window and the Q and E keys turn it. Wall-family pieces test space with the game's own volumes and deployables use their real collision shapes, while other unconnected pieces check bounding boxes. Deployable corner-sliding, raids and electricity come later.
Questions about the Base Builder
How does the Stability view work in the Rust Base Builder?
Stability in the Rust Base Builder shows how well each block is held as a percentage, worked out from the foundations up the way the game computes it. Any piece that would sit under the game's 5 % threshold is refused with Not stable enough, because it would collapse on placement.
How does Players on the cupboard change upkeep in the Rust Base Builder?
Players on the cupboard adds Rust's group upkeep tax to the bill: the first 4 players are free, the next 6 add 2 % each, and every player after that adds 4 %, up to 3 times the base upkeep. The Tool Cupboard bill of the Rust Base Builder shows the result a day.
How much does a stone 2x2 base cost in the Rust Base Builder?
In the Rust Base Builder, the worked stone 2x2 (28 blocks, an L-shaped stair, a Sheet Metal Door and a Tool Cupboard) costs 7,260 stones, 2,210 wood and 150 metal fragments from twig, and takes 895 stones plus 18.5 metal fragments a day in upkeep (12.3 %).
How does Symmetry work in the Rust Base Builder?
Symmetry in the Rust Base Builder repeats each piece you place across its active axes: Mirror across one line, Two mirrors across two, Four sides around a square foundation, or Triangle around a triangle foundation. Aim at a foundation to move the symmetry centre, and any blocked copy is skipped.
Can I walk inside a base in the Rust Base Builder?
Yes. Player view, next to Full screen in the Rust Base Builder, drops you inside the base at eye level: the mouse looks, W A S D walk, Shift runs, Ctrl or C crouches, Space jumps and E opens doors so you can test stairs, jumps and doorways. On a phone or a tablet a stick walks and a finger looks.
How do you flip a wall's soft side in the Rust Base Builder?
With a wall in hand, the Rust Base Builder frames its soft side in yellow, and R (Flip on a phone) puts it on the other face before you place it. Without R the game turns the soft side toward the player who places the wall, so build from inside or press R. A wall frame has no soft side.
How do you raise, lower or turn a foundation in the Rust Base Builder?
With a foundation in hand in the Rust Base Builder, hold Shift and roll the mouse wheel to raise or lower it over the ground, and press Q or E to turn it a few degrees at a time (in the player view the mouse wheel turns it); on a phone or a tablet the ▲ ▼ ↺ ↻ buttons beside the piece do the same. A foundation snapped to another takes its height, and one outside the game's ground height window turns red.
Why is the RustPotato Base Builder the best base builder for Rust?
The RustPotato Base Builder is the best base builder for Rust because it snaps every building block, door, frame fill and deployable it offers by the game's own sockets and placement rules, works out stability from the foundations up, bills twig and grade upgrades with Tool Cupboard upkeep brackets and group tax, and exports a share link or a Copy Paste file.
Is there a free online alternative to Fortify for Rust?
Yes. The RustPotato Base Builder is a free Rust base designer that runs in a browser tab, phone and tablet included, with nothing to install: it snaps pieces by the game's sockets and shows stability, cost and upkeep as you build. Fortify is a paid app installed through Steam, and it works with the Copy Paste plugin's file format too.